Grinding-machine.



P. E. GAIRE.

GRINDING MACHINE.

APPLICATION FILED AUG-14.1917.

Patented Mar. 26, 1918.

5 SHEETSSHEET i.

OOmOOO-O Il jll Li P. E. GAIRE.

GRINDING MACHINE. APPLICATION FILEDAUG1I4, 1917.

Patented Mar. 26, 1918.

5 SHEETS-SHEET 2- P. E. GAIRE.

GRINDING MACHINE.

APPLICATION FILED AUG. 14, 1917.

Patented Mar. 26, 1918.

5 SHEETS-SHEET 3- IIII. III.

Patented Mar. 26, 1918.

5 SHEETSQSHEET 4.

P. E. GAIRE.

GRINDING MACHINE.

APPLICATION FILED AUG-14,1917.

P. E. GAIRE. GRINDING MACHINE. APPLICATION FILED AUG. 14, 1917.

1918. 5 SHEETS-SHEET 5.

Batented Mar. 26

PAUL a. same, or rarnnsorv, new JERSEY.

GRINDING-MACHINE.

Specification of Letters Patent.

Patented Mar. 26, 1918.

Application filed August 14, 1917. Serial No. 186,178.

To all whom it may concern Be it known that I, PAUL E. GAIRE, a citi 'zen of France, residing at Paterson, in the county of Passaic and State of New Jersey, have invented certain new and useful Improvements in Grinding-Machines, of. which the following is a speclfication.

This invention appertains to the art of grindin machines, and particularly to such types of these machines as are adapted for grinding glass or the like.

In one of its broader phases my invention contemplates the provision of a. machine capable of edge grinding work in reference to both round and straight edge finishing. In order that my machine may do satisfactorily both classes of work above mentioned I employ a construction involving interchangeable work holding and actuating 1nstrumentalities, one ofwhich is useful for round edge grinding and theother of which is utilized when-the work to be performed is the grindingh ofv straight edges as on square glass or t e like.

Subsidiary to the foregoing, the invention involves novel work holding means together with novel work feeding means, both of said means being largely automatic in action, and being so associated as-to be sus' ceptible of simultaneous operation under certain conditions of service.

In addition to the foregoing this invention comprehends novel driving mechanism for the work actuating means whether the latter be of the rotary or reciprocating types used by me for round, and straight edge grinding respectively; the improved slapporting means for the work actuatlng vices as well as the work holding and feeding instrumentalities; and improved su porting means for the grinding device acilitating a wide range of ad ustment of the latter. v

This invention furthermore resides in certain details of construction representing refinements of the machine described in United States Letters Patent No. 915,284 issued March 16. 1909, to Gustave Gaire, Joseph Gail-eand myself.

In the accompanying drawings:

Figure 1 is a side elevation of a machine embodying my invention, certain parts including primarily the driving and support- "ing means for the work actuator being shown in section;

Fig. 2 1s a front elevation of the same;

Fig. 3 is a top plan view of the same;

Fi 4 is a fragmentary side elevation showlng a modified adaptation of the invention wherein the grinding instrumentalities are adapted to operate upon straight edges, the View involving the placing in position of certain parts for supporting and actuating the work, which parts are interchangeable with those illustrated in Figs. 1 to 3 wherein the machine is adapted for round edge work;

Fig. 5 is a fragmentary enlarged view showing primarily the work actuating and supporting means illustrated in Fig. 4;

Fig. 6 is a top plan view of the ma'ority of the parts shown in Fig. 5', the grin stone and some other detailsomitted;

Fig. 7 is a detail perspective view partly in section of the pitman wheel work-actuating means;

Fig. 8 is a perspective view of the pitman cooperative with the device of Fig. 7 and Figs. 9 and 10 are side and top planviews respectively of the work holding means cooperative with the work actuating device illustrated in Figs. 1 to 3.

Describing specifically that embodiment of my machine wherein the arrangement of the parts is such as to facilitate grinding of edges of round glass, reference is madeparticularly to Figs. 1 to 3 inclusive and Figs. 9 and 10. A denotes a table having the supporting legs B and carrying thereon a plate 1 having the spaced vertical standards 2. The plate 1 is secured to the table by bolts 3 passing through slots in the plate and permitting of required adjustments of the plate upon the top of the table, whereby to correspondingly adjust thegrindstone 4 which is carried by the standards 2'. The stone 4 is of the rotary type, is mounted on a spindle 5,

and the spindle 5 has end bearings in screws 6 adjustable upon lateral arms 7 carried by the standards 2. The arms 7 are held at suitable vertical adjustments relatively to the standards 2 by. set screws 8. The guard 9 preferably houses the'stone 4 and is supported by being fastened at 10, see Fig. 3, to a cross piece 11 the ends of which are secured to the arms 7 by the lock nuts 12.

It will be evident from the foregoing that a fairly wide range of adjustments horizontally and vertically, is obtainable for the grindstone 4 and said stone is disposed to operate upon round glass, :1 piece of which is designated 13, ,see Fig, 1, said glass being supported by a rotary work actuating device in the form of a head 14. The head 14 is detachably secured by a screw thread connection to the upper end of a drive shaft 15. The shaft 15 passes at its upper end through a suitable bearing 16 in the upper end of a vertically movable supporting frame 17 carried by the table. The lower end of the frame 17 likewise has asuitable bearing 18 for the shaft 15 and a cap plate 19 inclosing said bearing and covering the lower extremity of the shaft.

The frame 17 is peculiarly supported by the table, the latter being provided with an adjustable horizontal arm 20 formed at its outer end with a vertical guide 21 formed with guide grooves 21 on its sides. The frame 17 is provided with spaced guiding flanges 17 entering the guide grooves 21 and thereby interlocking the parts 17 and 21 in such a manner that the frame 17 may freely move up and down on the guide 21. The up and down movement of the frame 17 is limited by an adjustable stop in the form of a screw 22 mounted on the frame and carried by a plate 23 which itself is detachable from the frame 17 so that it may be secured in adjustable positions on the frame for a purpose to be hereinafter set forth.

The screw 22 is adapted to abut with the stop lug 24 projecting laterally from an arm 25 which is attached to a side of the guide 21. The arm 25 is of course non-adjustable vertically and said arm is formed with an opening through which the shaft 15 passes, said opening receiving a bushing 26 the function of which is to carry a drive pulley 27. The bushing 26 is secured to the arm 25 by a set screw 28 and the pulley 27 is directly supported by screws or like fastenings which connect the uppermost portion of said pulley with a plate 29, ball bearings being interposed between the pulley and the bushing 26 as seen best in Fig. 1.

At its lowermost portion the pulley 27 is equipped with a jaw clutch member 30 and below said clutch member is disposed a mov-" able clutch member 31 keyed to the shaft 15 and held against longitudinal movement dn said shaft by means of a set screw 32, the latter, however, permitting of adjustment of the member 31 lengthwise of said shaft.

The means for advancing the work or glass 13 to the stone 4 comprises a lever 33 pivoted at 34' to the lower end of the guide21. On its inner end the lever 33 carries the adjustably connected weight 34 and near its other end said lever has an adjustable screw element 35 engaging the cap plate 19 on the bottom of the frame 17 and adapted under the gravitative force of the weight 34, exerted through the lever 33, to move the frame 17 and all parts supported thereby including the shaft 15, upward. In this way the work actuator or head 14 is normally subject to the lifting action of the weight 34 whereby to steadily advance the glass 13 to the stone 4 in the grinding operation.

To hold the glass 13 in place I employ the device best shown in Figs. 1, 9 and 10, the same embodying a horizontally adjustable arm 36 connected by a bolt and slot connection 37 with the controlling and operating lever 38, see Fig. 1. The lever 38 is pivotally mounted upon a laterally and upwardly projecting extension 39 of the frame 17 and a spring 40 isinterposed between the outside of the frame 17 and the lower portion of the lever 38 and tends to maintain the work engaging means of the arm 36 in operative engagement with the glass 13. The spring 40 is prevented from displacement by means of a stem 41 carried by the frame 17 and passing through a slot in the lever 38, and the outer end of said stem 41 may have a nut 41 applied thereto to limit the outward movement of the lever 38. The work engaging means intermediate the pressure arm 36 and the glass or work 13 includes the rotative element 42 having a bearing at its upper end in a recess in a steel plate 43, the lower face of said element 42 having a contact surface preferably of pure gum rubber v and designated as 42. A spring member 44 holds the element 42 in position on the arm 36, and the parts 43 and 44 are secured to the arm 36 by a common holding screw 45.

It will be evident that the pressure arm 36 and the work engaging element 42 may be raised from the work by depressing the hand piece 38' of the lever 38, and said hand piece is arranged adjacent to the thumb piece 46 of a handle 46 which extends upwardly from the outer end of the lever 33. The relative disposition of the parts 38, 38, 46 and 46 is seen best in Fig. 2 and is such that as the operator places his hand upon the hand piece 38 to depress the latter, to permit of removal of the glass from the head 14 the thumb of the hand that may be used to depress the lever 33 whereby to cause the frame 17 and shaft 15 to gravitate dowir ward relative to the guide 21. The downward movement of the frame 17 in the manner stated will carry the glass 13 away from the grindstone and will: furthermore cause the clutch member 31 to become disengaged from the clutch member 30, the latter of which is constantly driven. \Vhen the parts 30 and 31 are disengaged the drive of the pulley 27 is disconnected from the shaft 17 and said shaft will of course stop.

The pulley 27 may be driven in any suitable manner but as shown a round belt 4? passes about said pulley and leads horizontally away from the same to a suitable. driving motor, passing around the vertical pulleys 48 seen best in Fig. 2.

When themachine is not in use it is contemplated to positively hold the frame 17 at the downward limit of its movement and to do this a thumb screw 49 is employed; said screw being carried by the arm 25 on the guide 21 and being adapted to be turned so as to engage the frame 17 and prevent the upward movement of said frame under the influence of the weighted actuating lever 33. There is provided beneath the guard 9 of the grindstone 4 a drip pan 50 having a suitable drain opening and said pan is formed with a centrally located flange surrounding the upper end portion of the shaft 15 and high enough to prevent the contents of the pan from running over said flange. A guard 51 in the form of an inverted dishlike member is clamped on the shaft in a position surrounding said flange of the pan 50-by being received between a shoulder at the upper portion of the shaft, and the head 14 which constitutes the Work actuator and carrier in this particular embodiment of the machine. To supply water to the grindstone 4, a suitable supply pipe 52 enters the housing 9 previously described.

An especially unique feature of the present invention is that arrangement of operating instrumentalities whereby the levers 33 and 38 are manipulated from a common point of control so as to practically simultaneously discontinue the drive of the shaft 15 and release of the Work. It is pre ferred, of course, to stop the shaft. 15 slightly ahead of the operation of the lever 38 for obvious reasons. Those adjustments of the parts whereby variations in the beveling or grinding action of the stone 4 are obtainable are so obvious as not to need special description. Likewise when desirable to actuate the lever 33 by the foot this may be done by depressing the foot piece 46 which as seen in Figs. 1 and 2 depends from the outer end of the lever.

The interchangeable parts susceptible of use as a part of the present invention to convert. my machine from one designed for round glass grinding to one for straight edge grinding, are best seenin Figs. 4 to 8 inclusive.

For the purpose in view I remove from the shaft 15 the work actuator or head 14 and substitute therefor a work actuator in the form ofi the pitman or crank wheel 55 shown clearly in Fig. 7, the same. adapted to be screwed upon the reduced upper extremity of the shaft 15. The wheel 55 is provided with a series of openings at different distances from the axis of the wheel, and any one of which is adapted to receive the pin 56 of the pitman 57, the end of the pitman opposite that having the pin 56 being formed with an opening to receive the fastening 58 forming a connection between the pitman and the reciprocating work 1101- der The work holder 59 is formed with a dove-tailed recess on its under side rece1v ing a dove-tailed portion 60 of a bed plate 61, the latter being removably attached to the upper end of the frame 17 by means of suitable bolts 62.. The work holder 59 is adapted to slide back and forth on the bed plate 61 under the actuation of the operating part-s and 57 and as an incident to the rotation of the shaft 15.

In the changed embodiment of my machine as now described the arm 25 is lowered somewhat on the guide 21 and this arrange ment lowers the drive pulley 27 and its clutch member 30 as well as connected parts. Likewise in this arrangement the clutch member 31 is at a lowered adjustment and located relative to the member 30 so that a less degree of relative movement of those parts would permit of engagement and disengagement. Obviously the lever 33 with its somewhat modified form of screw engaging member 35 coacts with the frame 17 and shaft 15 in substantially the manner hereinbefore set forth. On the work holder 59, see Figs. 5 and 6, .is carried a gage plate 63 adjustable to facilitate proper positioning of the glass designated (34, and the glass is held in place by the pressure arm 65 which is directly carried by a yoke 66 by being fastened to the latter by the adjustable connection at (57. A side of the yoke 66 has an arm 68 formed with a plurality of openings for connection with a spring 69 the latter being also connected with a plate 70 fastened to the work support 59 and depend ing .therefrom. A handle 65 is operable to rock the yoke 66 to elevate the arm 65.

The plates 70 may have a plurality of openings also for the connection 69, these openings and the openings in the arm 68 af' fording desirable adjustment means for the spring connection 69 whereby the spring may act with greater or less tcnsionum the pressure arm 65. Fasteucd to the top of the work support 59 is a second adjustable gage member- 71 in the form of a piece of laminated wood. the two gage devices 53 and 71 being sufficient to insure proper positioning of the glass til. If desired, cloth or any suitable material mayv be interposed between the pressure portion of the arm (55 and the glass 64 to prevent max-ring of the latter. The gage member 71 is secured to the member-59 bya bolt 72 seen best in Fig. 4, the member 71 being adjustably held by the bolt.

To take up any lost motion intermediate. the respective dove-tailed portions of the parts 59 and (30a jib 73 is interposed between said parts. at the outer side of the machine and rendered adjustable by the provision of screws 74 and the lock nuts 75. It will be apparent that the general operation of the attachments whereby straight edge grinding work is performed on my machine is substantially the same as described in reference to the. round glass grinding operation excepting that the work support 59 is reciprocated from the shaft 15, and the work itself is held in a somewhat difl'erent way from that set forth in the first described con struction and arrangement of parts. As seen in Fig. 4 on lowering of the frame 17 the glass 64: will be lowered from the grinding wheel 4: and at the same time the clutch members 30 and 31 become separated to discontinue the reciprocatory action of the support 59,

I prefer to use a larger grinding wheel 4: than that used in the round grinding work but this offers no difficulty owing to the adjustable means for supporting the said wheel as heretofore pointed out. As seen also in Fig. 4 I use a housing 9 for the wheel 4 and the lower portion of said housing overlaps the trough 76 secured to the bed plate 60 and adapted to carry off water or a similar fluid used in the grinding operation. Likewise a guard plate 77 having a function corresponding somewhat with the guard 'member 51 previously described, is carried by the work support 59 and overlaps or partially enters the pan 76 in a very ob vious manner. l f l.

When the machine as adapted for straight grinding work is not in use the frame 17 will be held at a lowermost adjustment by means of the thumb screw 49.

Having thus described my invention, what I claim as new is:-

1. In a grinding machine, the combination of a grinding wheel and means forsupporting and feeding work to said wheel compris ing a work support, automatic means for advancing said support to feed the work to a wheel, means for actuating said work support, and a single means for moving said support to withdraw the work from the grinding wheel and to simultaneously control 'the action of said actuating means.

2. In a grinding machine, the combination of a grinding wheel and means for supporting and feeding work to said wheel comprising a. work support, automatic means for advancing said support to feed the work to a wheel, means for actuating said work support, and a single means for moving said support to withdraw the work from the grinding wheel and discontinuing operation of said actuating means.

3. In a grinding machine, the combination of a grinding wheel and means for supporting and feeding work to said wheel comprising a work support, automatic means for advancing said support to feed the work to a Wheel, means for actuating said work support, means for moving said support to withdraw the work from the grinding wheel, a

I relatively stationary clutch member forming a transmission element between sald actuating means and the work support, a relatively movable clutch member to connect the relatively stationary clutch member with the work support, and means whereby the withdrawal movement of the work support effects movement of said relatively movable clutch member to disengage the same from the relatively stationary clutch member and thereby disconnect the actuating means from the work support.

4. In a grinding machine, the combination of a grinding wheel,'means for supporting and feeding work to said wheel including a movable frame, means normally acting on said frame to feed the work to the wheel, a work support on said frame, and driving means for said work support including clutch mechanism operative incident to feeding movement of the frame tomaintain an operative connection between the driving means and the work support, and operable incident to movement of the frame to withdraw the work from the wheel to disconnect said driving means from the work support.

5. In a grinding machine, the combina,

.tion of a (grinding wheel, means for sup- Rp'orting an I cluding a movable frame, means normally feeding work to said wheel inacting on said frame to feed the work to the wheel, a work support on said frame, and driving means for said work support including clutch mechanism operative incident to feeding movement of the frame to maintain an operative connection between the driving means and the work support, and operable incident to movement of the frame to withdraw the work from the wheel to disconnect said driving means from the work support, said work supportcomprising a shaft mounted on the frame and a member for directly carrying the work connected with said shaft so as to be driven thereby.

6. In a grinding machine, the combination of a grinding wheel, means for supporting and feeding work to said wheel including a movable frame, means normally acting-on said frame to feed the work to the wheel, a work support on said frame, and drivlng means for said work support including clutch mechanism operative incident to feeding movement of the frame to maintain an operative connection between the driving. means and the work support, and operable incident to movement of the frame to withdraw the work from the wheel to disconnect said driving means from the work support, said work support comprising a shaft mounted on the frame and a member for directly carrying the work connected with said shaft so as to be driven thereby, and manual means for movingsaid frame to withdraw the work fromsaid wheel.

7. In a grinding machine, the-combination of a grinding wheel, means for supporting and feeding work to said wheel including a movable frame, means normally actmg on said frame to' feed the work to the wheel, a work support on said frame,

" driving'means for said work support including clutch mechanism operative meident to feeding movement of the frame to.

the work in position on the work support,

and manual means for actuating said'pressure device and located proximate to the manual means aforesald so that the two manual means may be operated from a com- 7 mon point of actuation.

8. In a grinding machine, the combination of a grinding wheel, a supporting table therefor, a guide on said table, feeding means for work including a frame movable u on said guide, a work support mounted in said frame, means normally coacting with said frame to move the work support to feed the work to the wheel, a manual device to counteract the operation of the last men- W tioned means! to withdraw the work from the wheel, driving means for actuating the work support as it is moved to feed the work to the wheel, said driving means including clutch mechanism adapted to be rendered 40 operative and inoperative under the control of said manual device.

9. In a 'inding machine, the combination of a grmding wheel, a supportin table therefor, a guide on said table,

means for work including a frame movable on said guide, a work support mounted in said frame, means normally coacting with said frame to move the work support to feed the work to the wheel, a manual device to counteract the operation of the last mentioned means to withdraw the work from the wheel, driving means for actuatin the work support as it is moved to fee the work to the wheel, said, driving means in-' B5 eluding clutch mechanism adapted to be rendered operative and inoperatlve under the control of said manual device, and means for holding the frame in a position maintaining the work withdrawn from the wheel. I p

to 10; In a grinding machine, the combina-.

tion of a table, a grmding wheel thereon, an adjustable guide on the table, a frame vertically movable on said guide below the wheel, a shaft mounted on said frame, drivca ing means for said shaft comprising clutch ceding members on the shaft for efiecting a driving connection between the driving means and the shaft, a work support operable by said shaft to feed work to the wheel, and means to control vertical movement of the W0 frame whereby to cause feeding of work to the wheel'and whereby to control operative and inoperative relations of said clutch members to continue and discontinue respectively the driving action of the shaft. V5

11. In a grindlng machine, the combination of a table, a grinding wheel thereon, an adjustable guide on the table, a frame vertically movable on said guide below the wheel, a shaft mounted on said frame, 'driv- 0 ing means for said shaft comprising clutch members on the shaft for effecting a driving connection between the driving means and the shaft, a work support operable by said shaft to feed work to the wheel, means 35 to control vertical movement of the frame whereby .to cause feeding of work to the wheel and whereby to control operative and inoperative relations of said clutch members 'to continue and discontinue, respectively,

the driving action of the shaft, the last means including a 'lever, means acting on the lever and normally tending to move the frame to feed the work to the wheel, and a manual device for operating the lever to counteract its effect upon the frame for withdrawing the work from the wheel.

12. In a grinding machine, the combination of a table, a grinding wheel thereon, an adjustable guide on the table, a frame vertically movable on said guide below the 4 wheel, a shaft mounted on said frame, driving means for said shaft comprising clutch members on the shaft for effecting a driving connection between the driving means and the shaft, 21 work support operable by said shaft to feed work to the wheel means to control vertical movement of the frame whereby to cause feeding of work to the -'wheel and whereby to control operative and 11m inoperative relations of said clutch members "to continue and discontinue, respectively,

the driving action of the shaft, the last means including a lever, means acting on the lever and normally tendingto move the 11% frame to feed the work to the wheel, and a manual device for operatin the lever to counteract its effect upon t e. frame for withdrawing the work from the wheel, one of the clutch members aforesaid being mov- 12d able with the frame and therefore operable by said manual device whereby it may be disengaged from its clutch member to discontinue the driving action of the shaft on work withdrawal movement of the frame.

13. In a grinding machine, the combination of a table, a grinding wheel thereon, an adjustable guide on the table, a frame vertically movable on said guide below the wheel, a shaft mounted onsaid frame, drivwe ing means for said shaft comprising clutch members on the shaft for effecting a driving connection between the driving means and the shaft, a work support operable by said shaft to feed work to the wheel, means to control vertical movement of the frame whereby to cause feeding of work to the wheel and whereby to control operative and inoperative relations of said clutch memhere to continue and discontinue, respectively, the driving action of the shaft, the last means including a lever, means acting on the lever and normally tending to move the frame to feed the work to the Wheel, a manual device for operating the lever to counteract its effect upon the frame for withdrawing the Work from the wheel, one of the clutch members aforesaid being movable. with the frame and therefore operable by said manual device whereby it may be disengaged from its clutch member to discontinue the driving action of the shaft on Work Withdrawal movement of the frame, means for holding the work on the work support including a pressure arm, having means to directly engage the work, spring means connected with said pressure arm to normally maintain it in cooperation with the work, and a hand piece connected with said pressure arm to render the same inoperative and arranged proximate to the manual device controlling work withdrawal movement of the frame, whereby the hand piece and manual device may be operated from a common point of control.

' 14. In a grinding machine, the combination of a table, a grinding wheel thereon, work supporting and feeding means for the Wheel comprising a movable frame, work holding means associated with the frame including a pressure arm, a manual device controlling movement of said frame to withdraw the work from the grinding wheel, a hand piece connected with the pressure arm and controlling the action of the latter, said hand piece and said manual device being located proximate toone another whereby they may be operated from a common point of control. p

15. In a grinding machine, the combination with a table, of a grinding Wheel adjustably mounted thereon, a vertical guide adjustably mounted on the table, a vertically movable frame carried by said guide, work supporting and feeding means on said frame including a shaft, means for r0 tating said shaft including a driving pulley loose thereon, and clutch devices to connect said driving pulley with the shaft including a clutch member connected to the driving pulle the siaft, a lever havin a bearing on the frame and normally tending to cause Work feeding movement of the latter and relative connecting movement of the clutch members, and manual means connected with said lever to control the operation of the frame.

' 16. In a grinding machine, the combination with a table, of a grinding wheel adjustably mounted thereon, a vertical guide adj ustablv mounted on the table, a vertically movable frame carried by said guide, work supporting and feeding means on said frame including av shaft, means for rotating said shaft including a driving pulley loose thereon, clutch devices to connect said driving pulley with the shaft including a clutch member connccted to the driving pulley and a clutch member connected to the shaft, a lever having a bearing on the frame and normally tending to cause work feeding movement of the latter and relative connecting movement of the clutch members, manual means for operating said lever to relieve the frame of the normal action of the lever for effecting withdrawal movement of the work support relatively to the grinding wheel, and supporting means for the clutch members such that the withdrawal movement of the work support effects disengagement of said clutch members.

In testimony whereof I aiiix my signature.

PAUL E. GAIRE.

and a clutch member connected to 

